System and method for harmonic suppression
AssigneeTexas Instruments Incorporated
InventorsMichael A. Wu, Sudipto Chakraborty
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Abstract
A system to generate an oscillator signal. The system includes a multi-stage oscillator, where each stage generates an output. The system also includes a first weighting circuit coupled to the multi-stage oscillator. The first weighting circuit taps the outputs of at least some of the stages and applies a first variable weighting factor to each output of the tapped stages to generate a first weighted output for each of the tapped stages. The system also includes a first summing circuit coupled to the first weighting circuit. The first summing circuit sums the first weighted outputs of the tapped stages to produce the oscillator signal.
Claims20
A system to generate an oscillator signal, comprising:
- a multi-stage oscillator, wherein each stage generates an output;
- a first weighting circuit coupled to the multi-stage oscillator and configured to:
- tap the outputs of at least some of the stages;
- and
- apply a first set of variable weighting factors to the outputs of the tapped stages to generate first weighted outputs for the tapped stages, the weighting factor applied to at least one of the outputs differing from the weighting factor applied to at least one other of the outputs;
- and
- a first summing circuit coupled to the first weighting circuit and configured to sum the first weighted outputs of the tapped stages to produce the oscillator signal.
A method for generating an oscillator signal, comprising:
- tapping outputs of at least some stages of a multi-stage oscillator;
- applying a first set of variable weighting factor to the tapped stages to generate first weighted outputs for the tapped stages;
- and
- summing the first weighted outputs of the tapped stages to produce the oscillator signal.
Dependencies are inferred from the claim text.